Legroom cavity in vehicle backrest

ABSTRACT

A vehicle seat feature to provide additional legroom for feet or legs of a rear-facing child in a safety carseat installed in a vehicle seat, by utilizing a bounded cavity or the like in the vehicle seat backrest, which is accessible from the front side of the backrest by feet or legs of a rear-facing child. Such a cavity may in some embodiments be deployable and made available by removing or repositioning a barrier object or the like, which when restored may in effect constitute part of an otherwise normally functional backrest.

CROSS-REFERENCE

This is a continuation application claiming the priority benefit of U.S.application Ser. No. 13/491,548, filed 7 Jun. 2012, which claims thepriority benefit of U.S. provisional application No. 61/563,721, filedon 25 Nov. 2011, which are hereby incorporated by reference in theirentireties.

FIELD

This disclosure relates to the field of vehicle seating. Moreparticularly, this disclosure relates to automotive seating assembliesconfigured specifically to increase the legroom available to rear-facingchildren in safety carseats.

BACKGROUND

This section contains general relevant background content, which is notnecessarily prior art.

The American Academy of Pediatrics recommends that children be seatedrear-facing in their car-seats until age 2 or until exceeding the heightor weight limits of the car-seat (some of which can accommodate highlimits). Some US states are presently reflecting this policy in newlegislation, although the predominant rule still currently remains age 1or 20 lbs. While the optimal point to switch-over is of coursedebatable, many people advocate for staying rear-facing for as long aspossible; as this view becomes more prevalent (and even compulsory, forbetter or worse), there is value in easing any burdens associated withparental compliance.

Rear-faced child seating often presents a problem of limited legroom,especially for many children of above-average height or growth rate.Certain rear-facing-capable car seats (not to be confused with the car'sown seating) offer design features that can mitigate this problem (e.g.shell height, seat depth, recline, etc.), allowing higher height andweight limits. Vehicle-focused approaches involve modifications to theseat in which the safety seat resides—such as making the backrestfoldable over flatly on top of the seat portion to enable then placingthe carseat thereupon, or having the carseat sit further forward on theseat portion and then having it be supported with a stabilizing memberextending down to the car's floor (not common in the US). Simply movingor removing a backrest, or any severable portion thereof, might also bean option—though this could be suboptimal in many cases.

Some existing approaches do have utility, yet there remains an unsolvedneed for new solutions—as others have failed to sufficiently facilitateextended rear-facing (ERF). Research shows that many parents (up to 70%,in one recent study) still continue to turn their children's carseats tobe forward-facing long before the recommended time, and this can beattributed in significant part to inadequate legroom.

SUMMARY

This section briefly, and non-exhaustively, summarizes the subjectmatter of this disclosure.

This disclosure describes a vehicle seating feature that accommodates aneed for additional legroom for legs and/or feet of many rear-facingbabies and toddlers in safety carseats. This accommodation isessentially a defined cavity or opening in the front of the backrest(i.e., generally the approximately upright portion) of a car's seating(not to be confused with the child's “car seat”), in a manner adapted toprovide a place to receive a rear-faced child's feet.

The cavity, opening, or the like can be accessed from the front surfaceof the backrest of a vehicle seat of a vehicle interior (typicallyautomotive). It can be located in an area of the backrest approximatelywhere feet of rear-facing children typically go. It need not occupy alarge surface area relative to the overall size of the backrest. Thedepth or other dimensions might vary and/or be made variable, dependingupon the location of the seat and the amount of additional space to beprovided. The cavity can optionally be made accessible or inaccessibleon-demand, such as via a barrier or plugging object which could alsoserve to effectively restore adequate seating functionality (e.g.,lumbar support) for adult passengers.

LIST OF DRAWINGS

This section briefly identifies the accompanying drawings (figures) forthis disclosure. All drawings are for illustrative and explanatorypurposes only and not intended to limit the present invention to anyexample embodiments or aspects depicted.

FIG. 1 depicts an example of an automobile seat having a backrest with adefined cavity suitable for holding feet or legs of a rear-facing child.

FIG. 2 depicts an example seat as in FIG. 1, with a removable objectdisposed to plug the cavity when use of it is not needed.

FIG. 3 depicts an example seat as in FIG. 1, with a removable objectdisposed to flip up upon being pulled out of the cavity, and affix to anarea directly above the cavity.

FIG. 4A depicts an example seat as in FIG. 1, with a displaceable objectwhich has been pushed to slide inward into the backrest from its frontside. FIG. 4B depicts a rear view of this example, in which the rearside of the object is displaced outward when the front side of theobject is pushed inward.

FIG. 5 depicts an example seat as in FIG. 1, plus a thin slidablebarrier that slides down, displacing the bottom part of the barrier toprotrude below the backrest.

DETAILED DESCRIPTION

This section contains descriptive content for this disclosure, includingfor the associated drawings. It is also to be understood that much ofthe terminology and phraseology used herein is for the purpose ofdescribing particular embodiments or aspects, and accordingly is notintended to be limiting.

This disclosure describes an auto seating feature that accommodates theneed for additional legroom by many rear-facing babies and toddlers.This accommodation is essentially a predetermined cavity or opening inthe front of the back or backing/backrest (upright) portion ofautomotive seating (not to be confused with a “car seat,” also knownmore formally as a “child safety seat,” which is a separately purchasedobject that is placed upon the normal seating—and in which the childsits). The cavity could also be made accessible or inaccessibleon-demand, such as via a barrier or plugging object.

Many types of existing vehicle seating designs and materials are readilyamenable to such adaptations, including both exterior materials andinterior materials, neither of which need necessarily be of the samematerial as any removable portion made thereof. In some embodiments, itmay be aesthetically desirable for at least the “exposed surface” of anybarrier or plug to resemble or otherwise coordinate with that of the“main” backrest (e.g. sew lines, etc.). Of course, when the cavity isnot deployed due to plugging, blocking, etc., an object/barrier may wellbe considered as essentially part of the backrest itself.

The cavity, opening, chamber, void, recess, cut-out section, or the likeneed not comprise a large surface area relative to the overall size ofthe seating back, thus not compromising its structural integrity (eitherwhen “opened” or “closed”). A single standardized footprint couldaccommodate a wide range of needs, even allowing for some variability incarseat heights, etc. The footprint should ideally be large enough toencompass where many or most carseats cause feet to touch the back.Alternatively, the footprint could be made adjustable. A variety ofshapes are also possible (e.g., circle, rectangle, square, ellipse,among countless others) for the 2D surface geometry, as well for full 3Ddimensions (e.g., a tapered or rounded indentation, etc.). The depth isalso variable, depending upon the location of the seat (e.g. which row,if multiple rows of “back” seats, such as in a minivan or an SUV) andthe amount of additional legroom/footroom being sought. In someembodiments, it may be functionally desirable for any barrier or plug toutilize a similarly-constituted bulking material as the “main” backrest,so as to facilitate structural restoration of comfortable usability foran adult passenger when the extra rear-facing child legroom is notneeded.

One simple example embodiment may comprise simply a foam “cube” with anexterior surface functionally compatible with the main seating surface,being held in place either with just a snug fit or optional supplementalfeatures such as Velcro™, snaps, hooks, latches, zippers, etc., andremovable by the consumer—to be stored upon installing a carseat in thecorresponding location. (Replacements for the removable component mightbe made separately available, in case of loss or damage.) Automobileseating models typically comprise thousands of pieces of attribute data,which would naturally need to be appropriately adapted to accommodateeven a simple embodiment of a new cavity.

Removable portions of seat material may be designed to have boundariesor interfaces corresponding to seat surface design patterns. In someseat designs, it may be not be easy to conceal the existence of a“hidden” or closed cavity when not in use. And depending on how thickthe cushion layer is for a given seat design, it may be best to designany non-cushion panels, structures, subsystems, etc. in a manner thatavoids the designated cavity area so as to maximize dimensional options(to the extent feasible while maintaining sufficient structure anddesired functionality), along with any appropriate adaptations to theframe or other components. Rear or middle (i.e., non-front-row) seatscan be advantageous in this regard, as they may have more foam relativeto other functional components; back seats can also have thicker/deeperfoam to work with overall. In any event, the cavity itself requiresappropriate technical adaptations pertaining to things such as sewlines, seam allowances, cover fit, and sewing instructions, as well asgeometry of both cushion and skin material (all being customized to theparticular desired design parameters). The quantity of cavities to beprovided in a given car is also flexible: if desired, one could beincorporated into each vehicle seat that can accommodate a carseat(whether standard or as a customer option).

One option for an implementation employing a removable portion is tohave it remain attached in some way, either to serve a secondaryfunction or simply to prevent loss when the cavity is “open.” It couldbe loosely connected just to prevent loss, repositionable is some fixedway, or even embedded so as to essentially still remain part of thebackrest. For example, a currently preferred embodiment would be to havea removable portion which pulls out and flips up or down to be above orbelow the cavity area, affixing there via Velcro™ or invisible zipper(until the carseat gets uninstalled). Any mechanism for creating oropening the space on-demand should make provision for feasible andconvenient repositioning of all necessary material.

Other embodiments may comprise collapsible or otherwise internallymovable material that gets pushed inward, upward, sideward, etc. withinthe seat backing (the feasibility of which would depend upon the seatingmaterial and design). Depending upon how taught the skin material is(and/or how much slack is targetedly appropriated), together withwhether external protrusion is involved (vs. wholly-internaladjustments), etc., the reconfiguring could be actuated by pushing on orsliding a reversibly-movable portion of the backrest's front surface.Variations on this approach could include having the size and/or shapeof the hole be adjustable or otherwise customizable. In some versions,displaced material (rigid or soft) could extend to significantly behindthe backrest, effectively extending the legroom being added to an extentgreater than the thickness of the backrest itself (while maintaining thefull cavity's envelopment with material, for some measure of separationor protection). In any event, there are notable benefits to maintainingsome sort of definable limitation on the cavity, whether via materialenvelopment or otherwise, including child comfort and safety, pluspreventing intrusion upon whatever area lies “behind” the particularvehicle seat; moreover, a full or partial rear and/or peripheral barrierto the cavity can give some protection against projectiles going throughit (such as in the event of a collision). Such boundedness also tends toincrease the proportion of a cavity enjoying a protective peripheryaround the sides.

An embodiment without a removable portion might simply comprisestrategically placed partial holes in certain seat designs—configured toprovide convenient placement of feet or legs for a child sittingrear-facing, but also appearing and serving otherwise as an acceptabledefault seat design. This may not be an optimal design, however, becausedesirable cavity depth for child-legroom purposes may be too much depthfor an adult passenger sitting normally. (Note that fortuitouscavitation could potentially already happen today by happenstance,including via designs having removable/repositionable items built-in;such items could even themselves be integrated car-seats, although anysuch incidental cavitation is not configured for legroom purposes—and inany event is limited to such systems, which are not very common.Likewise, some armrests fold down and happen to leave a cavity betweenseats, yet these are neither located nor configured in a mannerconducive to enhancing child legroom, and can be considered separatefrom the main backrest portion, as it is not normally where a backrests.) Another way to avoid employing a truly “removable” portion butnevertheless serve an equivalent role could involve a variation of theinternal condensing/collapsing notion—such as having an air-filledobstruction occupy the cavity when not in use, being deflatable orrelatable upon demand (perhaps automatically, if power is run to it).

Following next are descriptions and explanations of the exampleembodiments depicted in the accompanying drawings. In conjunction withthe rest of this disclosure, these figures help to show a(non-exhaustive) range of alternative possibilities for implementingcertain essential and non-essential features, aspects, etc.

FIG. 1 depicts an example of an automobile seat having a backrest 101with a front surface 102 and a back surface 103. In the front surface isan opening to a cavity 104 suitable for holding feet or legs of arear-facing child. The cavity depth does not extend completely to thebackrest's back surface, and a lining at the “inner end” of the cavity105 corresponds to the limit of the legroom it provides; hence overall,the seat backrest effectively encloses most of the cavity. Othercomponents of this particular seat assembly include both a headrest 106and a seat cushion 107.

FIG. 2 depicts an example seat as in FIG. 1, with a removable object 201disposed to plug the cavity when use of it is not needed, such that theremovable object can constitute part of the backrest in a sufficientlyintegrated manner that could restore lumbar support for an adultpassenger using the seat. The removable object has both front outersurface material 202 and internal cushion material 203 similar to thebackrest. When this object is removed, it exposes the cavity 204 therebyrendering it available for use. And in this case, a standard invisiblezipper along and around the cavity's front edge 205 holds the removableobject in place in the cavity when the additional legroom is not neededor desired.

FIG. 3 depicts an example seat as in FIG. 1, with a removable object 301disposed to be outside the cavity but remain attached to the backrestvia contiguous backrest skin material 302 connecting the removable(removed) object to inside of the cavity while the cavity is open foruse. In this case, the removable object flips up upon being pulled outof the cavity, and is affixed to an area directly above the cavity onthe front surface of the backrest by a hook-and-loop fastener patch(i.e., Velcro™) 303, thus keeping the object nearby while stillmaintaining a well-opened cavity 304.

FIG. 4A depicts an example seat as in FIG. 1, with a displaceable object401 having a small loop or handle 402 on its front to facilitate pullingwhen desired. The object gets pushed to slide “inward” into the backrestfrom its front side, exposing peripheral lining 403 around the cavity404 being created. When the loop/handle is pulled, the cavity closesagain and can be fixed in this position with an invisible zipper alongits front perimeter 405. FIG. 4B depicts a rear view, including aback-side perimeter of the cavity 406 which in full extends through thefull thickness of the backrest, but only the displaceable object orappropriately sewn excess skin material displaced thereby 407 actuallyends up protruding out of the back of the main backrest, owing to eitheran internal catch curtailing the object's rearward slide (not shown) ora fixed amount of slack in optional excess skin or cover material.

FIG. 5 depicts an example seat as in FIG. 1, plus a thin slidablebarrier 501 that slides down directly below the cavity near the front ofthe main backrest (causing protrusion below underneath the backrest when“open”). Where the top of the slidable barrier meets the top of thecavity resides a snap 502 which must be disengaged to permit thedownward sliding of the slidable barrier and thus the opening of thecavity; a corresponding piece opposite the snap may reside upon the toppart of the barrier. Optional incremental catches (not shown) could bealso implemented to facilitate a partial or incomplete opening (e.g., togive a higher place to rest feet), and in any event could be employed tocurtail the downward slide in order to keep the barrier object withinits groove and/or to keep at least a small portion from falling too farto be able to grab it for closing. With this general approach, most ofthe cavity remains unoccupied whether it is open (accessible) or closed(inaccessible), since the slidable barrier “blocks” rather than “plugs”the cavity. Hence, from the inner edge of the cavity 503, on up to thebarrier, effectively constitutes a permanently-hallow portion of thecavity 504. Also in this kind of an embodiment, an optional shallowgroove on the underside of the top edge of the cavity could help to holdthe top of the barrier in place (when closed).

As automotive seating is a relatively mature field in the context ofwhich the present invention is reasonably feasible without undueexperimentation in light of the totality of this disclosure, existingseating design and production principles known in the art are reasonablyadaptable to this invention to those of ordinary skill. The descriptionherein is also sufficiently generalized to preserve flexibility for arange of vehicle types and/or configuration preferences. Standardengineering tools to facilitate incorporation of the features discussedherein could include a range of CAD applications employed in the field,including perhaps for example relevant industry-specific softwarepackages such as Vistagy's Seat Design Environment™. Depending upon thenumber of different vehicle models and/or interior variants beingaccommodated by the present invention, such tools could aid in managingthe various information useful for things such as trim engineering,virtual modeling or simulation, prototyping, and manufacturing purposesin the course of typical industrial implementations.

Notable advantages of the invention include, without limitation, helpingto alleviate the physical constriction of babies and toddlers(especially those of high-percentile height, and/or those of atemperament less amenable to such constriction) riding in cars whilestrapped in to rear-facing carseats (especially for long durations). Inturn, this helps to facilitate parental compliance with modernrecommendations and regulations calling for maintaining a rear-facingcarseat position until age 2 or beyond.

Advantages that one or more embodiments or aspects of the inventionoffer over some other solution approach(es) include, without limitation,the potential of being simpler and more versatile, being more compatiblewith common existing automotive interior and/or carseat designs, andbeing more cost-effective. In one aspect, it allows the main backrest toremain essentially in-place and otherwise unchanged rather than havingto be folded-over. Another aspect avoids the need for a stabilizing rod,such as one used when the carseat is placed up away from the backrest(which also may consume more room ahead of it, forcing the seat in frontof it further forward, as can also be the case with somecarseat-oriented solutions). Another aspect helps avoid needing to raisethe center of gravity, such as may occur with a higher carseat shell, orwhen employing a “folded-over” backrest. And of course, many of thepresent invention's embodiments, versions, etc. could be employed incombination with other solution approaches.

The present invention targets rear-facing passengers, who are typicallychildren. Note that for forward-facing adults, whose automotive legroomconcerns present fundamentally distinct problems and solutions, anycut-outs for enhancing legroom would need to be in the “back” of the“opposing” backrest, accommodating the knees but likely not the feet.But for rear-facers, by contrast, cut-outs or the like need to be in“front” the person's “own” backrest, accommodating the feet but likelynot the knees. And of course, the present invention is compatible withuse of a rear-faceable car-seat or the like. Moreover, many aspects orembodiments of the present invention also are conveniently amenable torestoring or resembling essentially “normal” structure on-demand forwhen the extra legroom is not desired, i.e., for functional and/oraesthetic purposes.

As pointed out, maintaining some bounds upon the scope of the legroomprovides benefits over simply detaching the backrest or segment(s)thereof entirely—which, in addition, could be more cumbersome than theopening/closing options of the present invention, as well as lack or beless conducive to other functions and features feasible with itsembodiments. Such benefits can include offering protection at the backand/or side(s) of the cavity, and, depending upon the cavity depth,precluding intrusion into space behind the backrest (and relatedly,precluding a need to even modify the backrest's rear surface at all).Merely providing a path through the backrest can render it moredifficult to close or be made closeable and/or more difficult to providea protective periphery and/or cavity backing, in addition to being lessamenable to several closing means (see below). Embodiments involving“non-front seat” assemblies can exploit higher proportions of bulkingmaterial susceptible to the modifications associated with the presentinvention. (Note that the particular amount of legroom provided by agiven embodiment depends upon the backrest used and the cavity's designconfiguration, and thus, while adding legroom, may not be enough for agiven child to “fully” extend his legs.)

The noted aspect of being conducive to closing means restoring orsimulating an un-deployed state (while the closable mechanism does notobstruct the cavity when needed), and in which lumbar support can beprovided for a normal forward-facing passenger, presents one of theadvantages that the closable/fillable embodiments enjoy over any“fortuitous” voids that may occur today (such as by the built-incarseats and movable armrests mentioned earlier), in addition to the keyfact that, as noted, those are not configured for legroom purposes.

In this disclosure, depending upon the context, reference to additional“space,” “legroom” or the like can contemplate either a deployed (i.e.,unfilled, open, unblocked, etc.) state characterized by being availableor ready for use, and/or potential space in an undeployed (i.e., filled,closed, blocked, etc.) state requiring some user action (i.e., removalof removable material, movement of a movable barrier, etc.) in order torender it fully or partially available. Also depending upon the context,reference to a “backrest” or “seat back” or the like can contemplate amovable/removable portion constituting part of the same—or else adistinct component that gets placed or positioned inside or upon it.

One of skill in the art will appreciate enumerable variations of theexamples and principles disclosed herein, which are intended to bewithin the scope of the present invention, whether explicitly suggestedherein or not—as reasonably understood in context. For example, certainqualities and features may potentially be optional and/or preferable,whether explicitly identified as such herein or not, whether expressedwith conditionality or not, and nevertheless be neither necessary norlimiting. Conversely, that which is in fact essential is likewiseascertainable to those of ordinary skill. While explained and describedcollectively by all text and drawings herein, the invention isultimately defined by the appended claims, which also constitute part ofthis specification; hence any explicit or implicit direct or indirectreferences to the invention or its characteristics should be understoodin this spirit.

What is claimed is:
 1. A vehicle seat assembly for increasing legroomavailable to a rear-facing passenger, comprising: a vehicle seatbackrest; and cavity means in said backrest for increasing legroom for arear-facing passenger, whereby said legroom remains of limited depth;wherein said cavity means occupies a small surface area relative to thesize of the backrest, and is configured for said legroom.
 2. The vehicleseat assembly of claim 1, wherein said vehicle seat backrest is anautomobile seat backrest.
 3. The vehicle seat assembly of claim 2,wherein said backrest does not comprise an integrated child carseat. 4.The vehicle seat assembly of claim 3, wherein said legroom does notextend to reach behind said backrest.
 5. The vehicle seat assembly ofclaim 4, further comprising closing means for rendering said legroominaccessible on demand.
 6. A vehicle seat assembly for increasinglegroom available to a rear-facing passenger, comprising: a vehicle seatbackrest; cavity means in said backrest for increasing legroom for arear-facing passenger, whereby said legroom remains of limited depth,said cavity means being configured for said legroom; and closing meansfor rendering said legroom inaccessible on demand; wherein said closingmeans is attached to, or repositioned within, said backrest when saidcavity means is open.
 7. The vehicle seat assembly of claim 6, whereinsaid vehicle seat backrest is an automobile seat backrest.
 8. Thevehicle seat assembly of claim 6, wherein said backrest does notcomprise an integrated child carseat.
 9. The vehicle seat assembly ofclaim 6, wherein said legroom does not extend to reach behind saidbackrest.
 10. The vehicle seat assembly of claim 1 or 6, wherein saidcavity means provides a protective periphery around said legroom.